Valve-seat.



J. H. MIXER.

VALVE SEAT. APPL IOATION FILED JUNE 20, 1912.

Patented Sept. 30, 191-3.

\ Ill NW N JOHN HENRY MIXER, OF SHALE, CALIFORNIA.

VALVE-SEAT.

emuel.

Specification of Letters Patent.

Patented Sept. 30, 1913.

Application filed June 20, 1912. Serial No. 704,930.

T all whom, it ma y'fconccrn:

Be it known that-,1, JOHNPHENRY MI ER,

a citizen of the'Unitedlst'ates, residing at Shale, in the county of Kern and State of California, have invented new and useful Improvements in-Valve-Seats, of which the I following is a specification.

This'invention relates to valve seats particularly intended for standing valves of oil well pumps or other standing valves, where the fluid is pumped under heavy pressure and is liable "to cut the valve seat by reason of such pressure or by reason of grit or cor- 'rodin agent contained in the fluid pumps. Stan 111g valves for well pumps are made with a removable valve seat ring which is clamped in position on a tubular valve body, and in practice it is not possible to make this movableva'lve seat rin the valve body with sudicient accuracy and tightness to prevent leakage of fluid with the result that eventually the valve seatring and body become cut or worn by fluid squeezing through between them, carrying gas or particles of grit and gradually cutting away the metal.

The main object of the present invention is to provide a. valve seat ring which will seat itself so accurately and tightly on the valve body that it is not possible for fluid to pass between them so that there is no wear due to leakage under the seat ring.

Other objects of the invention will appear hereinafter. I

The accompanying drawings illustrate embodiments of my invention, and referring thereto:

Figure Us a vertical section of a viilve scat,

showing one form of the valve ring. F ig. 2 1s a section on llne m -rc 1n Fig. l. F1g.-.

3 is a section on line a -m in Fig. 1. Fig. 4 is a perspective view of the valve seat ring. Fig. 5 is a vertical section showing another form of the invention. Fig. 6 is a section on line a2-a: in Fig. 5. Fig 7 a perspective view of the form of valve seat ring shown in Figs. 5 and 6.

The lower member or body 1 of the valve may be of any usual'or suitable c0nstruction, being tubular in shape and being provided with the usual means for securing it in place in the working barrel. The upper end of this tubular valve body is formed with an upwardly flaring curved face or seat 2 which may, as shown in Fig. 1, be

clamping means,

of the valve seat ring,

fit its bearing on' concavely curved to fit a correspondingly formed valve seat ring.

The valve seat ring 3 is tapered on its peripheral face at each end, so as to seat on and make tight contact with the flaring face 2 of the valve body 1, the tapering portions lfif the valve seat ring being preferably convek to. conform to the concavity of the flaringface 2. i The valve seat ring 3 is held in position on the flaring face 2 by any suitable said cage being provided with a shoulder 6 adapted to engage the upper tapered face 4: said shoulder being preferably tapered to fit the flaring face of the ring. The cage 5 screws on the valve body, said. cage and body being screw threaded in the usual manner as shown at 5.

The two tapering faces iv of the valve seat.

ring being identical in form, the said ring is invertible so that either end may-be.

placed on the daring face 2 and will fit 'tightlytherein when. forced down by the clamping means. The upperedge of the bore 7 of the valve seat ring forms a seatfor the valve closure means, consisting of the valve ball 8.

In assembling the valve, the valve seat ring 3' is placed on the flaring face-2 of the valve body 1 and the cage 5 with the ball 8 therein is screwed on the valve body 1 until its'shoulder 6 engages the upper tapering face of the valve seat ring, forcing said valve seat ring into tight contact with the daring face or seat 2 on the valve body. On account of the. flaring shape of the seating faces on the valve body and valve seat ring, the valve seat ring will find a true seat so as for example, the cage 5, w

to make a tight joint in a manner that is not possible with a flat seat, the ring accommo dating itself to the seating surface 2 so as to seat with equal tightness all around. TlllS accolhu'mdation of the valve seat ring to the seating face therefor is facilitated by the curvature oft-he scatingfaces, enabling the ring to tilt sligbtlyss required in one direction or the other and ittis further facilitatedby the taper of the shoulder 6 on the cage 5. Moreover, the flare of the seating face 2 enables the valve scat ring 3 to not use Wedge in expanding the relatively thin upper end portion of the valve body. thereby insuring a tight and close fit. In order to enable the valve seat ring to accomplish this result it is necessary that the said ring should be peredportion of the valve body. This is accomplished by making the said valve seat ring out of the us'ualanaterial, viz., a metal which is hard as, or harder than .the materialof the valve body, and making it thicker than the adjacent tapered part of the valve body as shown.

In the form shown in Figs. 5, (5 and 7, thevalve body 11 is formed with a flaring beveled face 12 at its upper end to fit beveled or tapered faces 14 on a valve seat ring 15, said. faces 12 and 1 1 being conical instead of curved as in Fig. 1. The valve cage 5 in thiscase bears by its shoulder 16 against the upper face 14 of the valve seat ring, so

as to press the lower face of the valve seat ring tightly against the face 12. This form of the invention also provides for expansion of the upper thin portion of the valve body 1, insuring a tight fit.

What I claim is: 1. A pump valve seat comprising a tubular-valve body provided with a flaring rin face, a metal valve seat ring having tapered peripheral lower and upper faces and a member having a shoulder provided-with a flaring ring face binding on the valve seat ring.

2. A pump valve seat comprising a tubular valve body and provided with aflaring ring face, a metal valve seat ring having curved peripheral lower and upper faces tapered peripheral lower and upper faces and a clamping cage having a screw thread working on the screw thread of the valve body and a shoulder provided with a flaring ring face binding on the valve seat ring'."

4. A valve seat for a standing valve, well pump comprising a tubular valve body having means at its lower end for securing it to a working barrel and provided with a flaring ring'face and a screw thread at its upper end, a metal valve seat ring having curved peripheral lower and upper faces and a clamping cage having a screw thread working on the screw thread of the valve body and a shoulder provided with a flaring ring face binding on the valve seat ring.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this Mthfday of June, 1912.

1 JOHN HENRY MIXER.

In presence of i ARTHUR P. KNIGHT, MARTHA M. LANGE; 

